Lock.



Patented Mar. 12, 1918.

T. I. SEVERANCE.

LOCK.

APPLICATION FILED OCT. 2, ISIS- WITNESSES THoMAs J. sEvEaANeE, or waan. MASSACHUSETTS.

LOCK.

Speeication of Letters Patent.

rammed. Mar. is, reis.

Appli-cation filed October 2, 1916. Serial No. 123,406.

To all whom t may concern:

Be it known that I, THOMAS J. SEVER- ANon, a citizen of the United States, residing at Ware, in the county of Hampshire and State of Massachusetts, have invented certain new and useful improvements in Locks, of which the following is a specification.

This invention relates to an improved door lock andthe principal object of the invention is to provide a lock so constructed that the locking bolt may be moved to a locking position by means of a lever actuated from the latching plunger upon turning the door knob.

Another object oi' .the vinvention is to so construct this lock that the latching plunger may be moved to open the door without moving the locking bolt to a locking position but at the same time to permit the locking bolt to be moved to a locking position upon further turning` of the door knob.

Another object of the invention is to so construct this lock that when the door knob is released and the latching plunger returns to its normal position, the looking bolt will remain in the locked position until released by a key.

Another object of the invention is to provide a lock of the character described which will be compact and comprise a few number of parts. Y

This invention is illustrated in the accompanying drawings, wherein Figure 1 is a view showing the improved lock with one wall of the housing removed and the guiding pins and key shown in section,

Fig. 2 is a vertical transverse sectional view through the lock taken along the line 2-2 of Fig. 1.

The housing 10 is provided with a removable wall 11 and has its end walls 12 provided with passageways or openings 13 and 14: through which the latching plunger 15 and locking bolt 16 may pass. The latchingplunger 15 is provided with a rack 17 and carries a supporting guiding pin 18.

which extends into the guides or tracks 19. The locking bolt is also provided with a guiding and supporting pin 20 similar to the pin 18 and fitting into the track 21. It will thus be seen that the latching plunger and locking bolt may move longitudinally but will be limited in their longitudinal f movement.

A lever 22 :for actuating the locking bolt 16 and moving the same to a locking position is pivotally mounted in the housing 10 by means of in 28 and is provided with a heel 24 so that when the lever is swung upon its pivot 23, the locking bolt will be engaged by this heel and moved to the locking position. A spring 25 engages the upper end portion of this flever 24 and yieldably holds the lever in the position shown in Fig. 1 with its end engaging the latching plunger' 15. It should be noted that the forward portion of the lever is cut out as shown at 26 thus providing a seat for theinner end of' the latching plunger. A spring 2.7 is secured in the housingabove the locking bolt 16 and has its tree end portion bent to provide a tooth 28 which will fit into the notches 29 and 30 and releasably hold this locking bolt. in the adjusted position.

When in use, this lock is put in place in the door and the shaft 31 which will carry the usual door-knob is passed through the hub of the gear wheel 32, the teeth of which mesh with the rack bar 1'?. The spring 25 through engagement with the upper portion of the lever 22, moves this lever to hold the latch in the extended positionand it is therefore not necessary to turn the knob in order vto close the door and latch the same. Upon releasing the knob the spring moves the latch to the extended position and rotates the gear and shaft 31. When opening the door it is simply necessary to turn the knob and the latch will be drawn inwardly. lf it is desired to lock the door, the knob will be turned a greater extent and further movement of the latching plunger will bring the heel 24 of the lever 22 into engagement with the locking bolt 16 and move the same outwardly. The spring 27 will then have its tooth 28 seated in the notch 30 and the locking bolt will be securely held in place. The door. knob will then be released and the lever and latching plunger will return to the position shown 1n the drawing. When it is desired to open the door, a key will be passed through a key-hole 33 and when the key is turned, it will engage the locking bolt and move it to the releasing p0- sition. It will thus be seen that a very convenient. device has been provided for securing a door either temporarily 0r for locking it against opening with a key.

What is claimed is l. A lockr comprising a housing having a latohing plunger slidably mounted in the housing for extending through the upperH opening and provided with rack teeth, a turning shaft extending through the housing, a gear mounted upon the shaft within the lhousing and having its teeth meshing with the rack teeth of the latohing plunger, a locking bolt slidably mounted in the housingfor extending through the lower opening and provided with teeth leading from its upper face, a spring mounted in the housing for. fitting into the teeth of the lockinggbolt and releasably holding the looking bolt in a set position, a lever pivotally mountedin the housing and having its upper end extending for engagement with the inner endv of the latching plunger and its lower end for engagement withzthe looking bolt when the lever is moved by the latching plunger moving inwardly, andv resilient means engaging the `lever to yieldably hold y the same in 'engagement with the inner end ofthe latching plunger. Y

2. A lock comprising a housing having Gopiesrof this patent may be obtained for openings in one end wall, a latohing plunger slidably mounted in the housing for extending through one opening Vand provided with vrack teeth, a turning shaft Y extending throughV the housing, a gear mounted upon VFthe Vshaft within the housinghaving its teeth meshing with the rack teeth vol the latehing plunger, a locking bolt slid'ably mounted in the housingV for Vextending through the lsecondl opening, a lever pivotally mounted in. the housing andrhaving one end extending for engagement with the vinner yendv ofthe latching plunger and its opposite end for engagement with the loekn ing bolt when the lever is moved vby the latching plunger moving inwardly, and resilient means engaging the lever to yieldablyhold the same inoengagementwith-the inner end of the latching plunger. y

In testimony whereof I aix my signature in presence of two witnesses. Y

THOMAS J. SEVERANCE. litnesses:Y f o HUBEhT lVLCo'NEY, GRACE L. MORAN.

ve cents each, by atldressingthe flommi'ssio'n'er of Patents, Washington, l). C. 

